Hello Dave. Richard and stressers ,
I am dealing with piping stress system with design temperature -48 c and the material is A333 which has minimum design metal temperature -45.5 C according to ASME B31.3.
We decide to apply impact test on it. But when I import design temperature data to Caesar II and use Material A333, I find that Sh2 =0.
My questions are
what is Sh2 refer to ?
how can I define that we will make impact test on Caesar II?
Can I use Allowable stresses that define in Caesar II for this Material A333 at this temperature -48?

Regards

There are several A333s in B31.3. Some have a minimum temperature of -46C. I assume you picked one of these. If you enter T2=-48C, CAESAR II will show Sh2=0 because no value exists.
CAESAR II does not directly address "impact test" requirements.
You may use CAESAR II to assist in calculating an "unintensified operating" stress when considering a low temperature impact test exemption.

Thank you Dave. But Can you make it more simple because I have confuse in some points.
IF I enter T2= -48C How can I define SH2?
How can I calculate unintensified operating stress by Caesar II ?
can I just input T2= -48C and just do the analysis ?

You can type in your value for SH2 if you wish.
I believe there are other posts discussing this un-intensified stress. I would set the stress type (for the "condition under consideration") as SUS and specify a sustained stress multiplier of 0.001 (in the configuration file).
See Fig. 323.2.2B notes. With a low stress ratio, you may be exempt from impact test of your pipe material.